path: root/filter/filter-filter.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Copyright (C) 2000-2002 Ximian Inc.
 *
 *  Authors: Not Zed <notzed@ximian.com>
 *           Jeffrey Stedfast <fejj@ximian.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */


#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <string.h>
#include <gtk/gtkframe.h>
#include <gtk/gtkhbox.h>
#include <gtk/gtkmenuitem.h>
#include <gtk/gtkoptionmenu.h>
#include <gtk/gtkscrolledwindow.h>
#include <gtk/gtktable.h>
#include <libgnome/gnome-defs.h>
#include <libgnome/gnome-i18n.h>
#include <libgnomeui/gnome-stock.h>

#include "filter-filter.h"
#include "filter-context.h"

#define d(x)

static int validate(FilterRule *fr);
static int filter_eq(FilterRule *fr, FilterRule *cm);
static xmlNodePtr xml_encode (FilterRule *fr);
static int xml_decode (FilterRule *fr, xmlNodePtr, RuleContext *rc);
static void rule_copy (FilterRule *dest, FilterRule *src);
/*static void build_code(FilterRule *, GString *out);*/
static GtkWidget *get_widget (FilterRule *fr, RuleContext *rc);

static void filter_filter_class_init (FilterFilterClass *klass);
static void filter_filter_init (FilterFilter *ff);
static void filter_filter_finalise (GObject *obj);


static FilterRuleClass *parent_class = NULL;


GType
filter_filter_get_type (void)
{
    static GType type = 0;
    
    if (!type) {
        static const GTypeInfo info = {
            sizeof (FilterFilterClass),
            NULL, /* base_class_init */
            NULL, /* base_class_finalize */
            (GClassInitFunc) filter_filter_class_init,
            NULL, /* class_finalize */
            NULL, /* class_data */
            sizeof (FilterFilter),
            0,    /* n_preallocs */
            (GInstanceInitFunc) filter_filter_init,
        };
        
        type = g_type_register_static (FILTER_TYPE_RULE, "FilterFilter", &info, 0);
    }
    
    return type;
}

static void
filter_filter_class_init (FilterFilterClass *klass)
{
    GObjectClass *object_class = G_OBJCT_CLASS (klass);
    FilterRuleClass *fr_class = (FilterRuleClass *) klass;
    
    parent_class = g_type_class_ref (FILTER_TYPE_RULE);
    
    object_class->finalize = filter_filter_finalise;
    
    /* override methods */
    fr_class->validate = validate;
    fr_class->eq = filter_eq;
    fr_class->xml_encode = xml_encode;
    fr_class->xml_decode = xml_decode;
    /*fr_class->build_code = build_code;*/
    fr_class->copy = rule_copy;
    fr_class->get_widget = get_widget;
}

static void
filter_filter_init (FilterFilter *ff)
{
    ;
}

static void
unref_list (GList *l)
{
    while (l) {
        g_object_unref (l->data);
        l = l->next;
    }
}

static void
filter_filter_finalise (GObject *obj)
{
    FilterFilter *ff = (FilterFilter *) obj;
    
    unref_list (ff->actions);
    g_list_free (ff->actions);
    
        G_OBJECT_CLASS (parent_class)->finalize (obj);
}

/**
 * filter_filter_new:
 *
 * Create a new FilterFilter object.
 * 
 * Return value: A new #FilterFilter object.
 **/
FilterFilter *
filter_filter_new (void)
{
    return (FilterFilter *) g_object_new (FILTER_TYPE_FILTER, NULL, NULL);
}

void
filter_filter_add_action (FilterFilter *fr, FilterPart *fp)
{
    fr->actions = g_list_append (fr->actions, fp);
    
    filter_rule_emit_changed ((FilterRule *) fr);
}

void
filter_filter_remove_action (FilterFilter *fr, FilterPart *fp)
{
    fr->actions = g_list_remove (fr->actions, fp);
    
    filter_rule_emit_changed ((FilterRule *) fr);
}

void
filter_filter_replace_action (FilterFilter *fr, FilterPart *fp, FilterPart *new)
{
    GList *l;
    
    l = g_list_find (fr->actions, fp);
    if (l) {
        l->data = new;
    } else {
        fr->actions = g_list_append (fr->actions, new);
    }
    
    filter_rule_emit_changed ((FilterRule *) fr);
}

void
filter_filter_build_action (FilterFilter *fr, GString *out)
{
    g_string_append (out, "(begin\n");
    filter_part_build_code_list (fr->actions, out);
    g_string_append (out, ")\n");
}

static int
validate (FilterRule *fr)
{
    FilterFilter *ff = (FilterFilter *) fr;
    GList *parts;
    int valid;
    
        valid = FILTER_RULE_CLASS (parent_class)->validate (fr);
    
    /* validate rule actions */
    parts = ff->actions;
    while (parts && valid) {
        valid = filter_part_validate ((FilterPart *) parts->data);
        parts = parts->next;
    }
    
    return valid;
}

static int
list_eq (GList *al, GList *bl)
{
    int truth = TRUE;
    
    while (truth && al && bl) {
        FilterPart *a = al->data, *b = bl->data;
        
        truth = filter_part_eq (a, b);
        al = al->next;
        bl = bl->next;
    }
    
    return truth && al == NULL && bl == NULL;
}

static int
filter_eq (FilterRule *fr, FilterRule *cm)
{
        return FILTER_RULE_CLASS (parent_class)->eq (fr, cm)
        && list_eq (((FilterFilter *) fr)->actions, ((FilterFilter *) cm)->actions);
}

static xmlNodePtr
xml_encode (FilterRule *fr)
{
    FilterFilter *ff = (FilterFilter *) fr;
    xmlNodePtr node, set, work;
    GList *l;
    
        node = FILTER_RULE_CLASS (parent_class)->xml_encode (fr);
    g_assert (node != NULL);
    set = xmlNewNode (NULL, "actionset");
    xmlAddChild (node, set);
    l = ff->actions;
    while (l) {
        work = filter_part_xml_encode ((FilterPart *) l->data);
        xmlAddChild (set, work);
        l = l->next;
    }
    
    return node;

}

static void
load_set (xmlNodePtr node, FilterFilter *ff, RuleContext *rc)
{
    xmlNodePtr work;
    char *rulename;
    FilterPart *part;
    
    work = node->childs;
    while (work) {
        if (!strcmp (work->name, "part")) {
            rulename = xmlGetProp (work, "name");
            part = filter_context_find_action ((FilterContext *) rc, rulename);
            if (part) {
                part = filter_part_clone (part);
                filter_part_xml_decode (part, work);
                filter_filter_add_action (ff, part);
            } else {
                g_warning ("cannot find rule part '%s'\n", rulename);
            }
            xmlFree (rulename);
        } else {
            g_warning ("Unknown xml node in part: %s", work->name);
        }
        work = work->next;
    }
}

static int
xml_decode (FilterRule *fr, xmlNodePtr node, RuleContext *rc)
{
    FilterFilter *ff = (FilterFilter *) fr;
    xmlNodePtr work;
    int result;
    
        result = FILTER_RULE_CLASS (parent_class)->xml_decode (fr, node, rc);
    if (result != 0)
        return result;
    
    work = node->childs;
    while (work) {
        if (!strcmp (work->name, "actionset")) {
            load_set (work, ff, rc);
        }
        work = work->next;
    }
    
    return 0;
}

static void
rule_copy (FilterRule *dest, FilterRule *src)
{
    FilterFilter *fdest, *fsrc;
    GList *node;
    
    fdest = (FilterFilter *) dest;
    fsrc = (FilterFilter *) src;
    
    if (fdest->actions) {
        g_list_foreach (fdest->actions, (GFunc) gtk_object_unref, NULL);
        g_list_free (fdest->actions);
        fdest->actions = NULL;
    }
    
    node = fsrc->actions;
    while (node) {
        FilterPart *part = node->data;
        
        g_object_ref (part);
        fdest->actions = g_list_append (fdest->actions, part);
        node = node->next;
    }
    
    FILTER_RULE_CLASS (parent_class)->copy (dest, src);
}

/*static void build_code(FilterRule *fr, GString *out)
{
        return FILTER_RULE_CLASS (parent_class)->build_code (fr, out);
}*/

struct _part_data {
    FilterRule *fr;
    FilterContext *f;
    FilterPart *part;
    GtkWidget *partwidget, *container;
};

static void
option_activate (GtkMenuItem *item, struct _part_data *data)
{
    FilterPart *part = g_object_get_data (item, "part");
    FilterPart *newpart;
    
    /* dont update if we haven't changed */
    if (!strcmp (part->title, data->part->title))
        return;
    
    /* here we do a widget shuffle, throw away the old widget/rulepart,
       and create another */
    if (data->partwidget)
        gtk_container_remove (GTK_CONTAINER (data->container), data->partwidget);
    
    newpart = filter_part_clone (part);
    filter_part_copy_values (newpart, data->part);
    filter_filter_replace_action ((FilterFilter *) data->fr, data->part, newpart);
    g_object_unref (data->part);
    data->part = newpart;
    data->partwidget = filter_part_get_widget (newpart);
    if (data->partwidget)
        gtk_box_pack_start (GTK_BOX (data->container), data->partwidget, FALSE, FALSE, 0);
    
    g_object_set_data (data->container, "part", newpart);
}

static GtkWidget *
get_rule_part_widget (FilterContext *f, FilterPart *newpart, FilterRule *fr)
{
    FilterPart *part = NULL;
    GtkWidget *menu;
    GtkWidget *item;
    GtkWidget *omenu;
    GtkWidget *hbox;
    GtkWidget *p;
    int index = 0, current = 0;
    struct _part_data *data;
    
    data = g_malloc0 (sizeof (*data));
    data->fr = fr;
    data->f = f;
    data->part = newpart;
    
    hbox = gtk_hbox_new (FALSE, 0);
    p = filter_part_get_widget (newpart);
    
    data->partwidget = p;
    data->container = hbox;
    
    menu = gtk_menu_new ();
    while ((part = filter_context_next_action (f, part))) {
        item = gtk_menu_item_new_with_label (_(part->title));
        
        g_object_set_data (item, "part", part);
        g_signal_connect (item, "activate", option_activate, data);
        gtk_menu_append (GTK_MENU (menu), item);
        gtk_widget_show (item);
        
        if (!strcmp (newpart->title, part->title))
            current = index;
        
        index++;
    }
    
    omenu = gtk_option_menu_new ();
    gtk_option_menu_set_menu (GTK_OPTION_MENU (omenu), menu);
    gtk_option_menu_set_history (GTK_OPTION_MENU (omenu), current);
    gtk_widget_show (omenu);
    
    gtk_box_pack_start (GTK_BOX (hbox), omenu, FALSE, FALSE, 0);
    if (p)
        gtk_box_pack_start (GTK_BOX (hbox), p, FALSE, FALSE, 0);
    
    gtk_widget_show_all (hbox);
    
    return hbox;
}

struct _rule_data {
    FilterRule *fr;
    FilterContext *f;
    GtkWidget *parts;
};

static void
less_parts (GtkWidget *button, struct _rule_data *data)
{
    FilterPart *part;
    GtkWidget *rule;
    GList *l;
    
    l = ((FilterFilter *) data->fr)->actions;
    if (g_list_length (l) < 2)
        return;
    
    rule = g_object_get_data (button, "rule");
    part = g_object_get_data (rule, "part");
    
    /* remove the part from the list */
    filter_filter_remove_action ((FilterFilter *) data->fr, part);
    g_object_unref (part);
    
    /* and from the display */
    gtk_container_remove (GTK_CONTAINER (data->parts), rule);
    gtk_container_remove (GTK_CONTAINER (data->parts), button);
}

static void
attach_rule (GtkWidget *rule, struct _rule_data *data, FilterPart *part, int row)
{
    GtkWidget *remove;
    GtkWidget *pixmap;
    
    gtk_table_attach (GTK_TABLE (data->parts), rule, 0, 1, row, row + 1,
              GTK_EXPAND | GTK_FILL, 0, 0, 0);
    
    pixmap = gnome_stock_new_with_icon (GNOME_STOCK_PIXMAP_REMOVE);
    remove = gnome_pixmap_button (pixmap, _("Remove"));
    g_object_set_data (remove, "rule", rule);
    g_object_set_data (rule, "part", part);
    /*gtk_button_set_relief (GTK_BUTTON (remove), GTK_RELIEF_NONE);*/
    g_signal_connect (remove, "clicked", less_parts, data);
    gtk_table_attach (GTK_TABLE (data->parts), remove, 1, 2, row, row + 1,
              0, 0, 0, 0);
    gtk_widget_show (remove);
}

static void
more_parts (GtkWidget *button, struct _rule_data *data)
{
    FilterPart *new;
    
    /* create a new rule entry, use the first type of rule */
    new = filter_context_next_action ((FilterContext *) data->f, NULL);
    if (new) {
        GtkWidget *w;
        guint16 rows;
        
        new = filter_part_clone (new);
        filter_filter_add_action ((FilterFilter *) data->fr, new);
        w = get_rule_part_widget (data->f, new, data->fr);
        
        rows = GTK_TABLE (data->parts)->nrows;
        gtk_table_resize (GTK_TABLE (data->parts), rows + 1, 2);
        attach_rule (w, data, new, rows);
    }
}

static GtkWidget *
get_widget (FilterRule *fr, RuleContext *rc)
{
    GtkWidget *widget;
    GtkWidget *parts, *inframe;
    GtkWidget *hbox;
    GtkWidget *add, *pixmap;
    GtkWidget *w;
    GtkWidget *frame;
    GtkWidget *scrolledwindow;
    GtkObject *hadj, *vadj;
    GList *l;
    FilterPart *part;
    struct _rule_data *data;
    FilterFilter *ff = (FilterFilter *)fr;
    int rows, i = 0;
    
        widget = FILTER_RULE_CLASS (parent_class)->get_widget (fr, rc);
    
    /* and now for the action area */
    frame = gtk_frame_new (_("Then"));
    inframe = gtk_vbox_new (FALSE, 3);
    gtk_container_add (GTK_CONTAINER (frame), inframe);
    
    rows = g_list_length (ff->actions);
    parts = gtk_table_new (rows, 2, FALSE);
    data = g_malloc0 (sizeof (*data));
    data->f = (FilterContext *) rc;
    data->fr = fr;
    data->parts = parts;
    
    hbox = gtk_hbox_new (FALSE, 3);
    
    pixmap = gnome_stock_new_with_icon (GNOME_STOCK_PIXMAP_ADD);
    add = gnome_pixmap_button (pixmap, _("Add action"));
    /* gtk_button_set_relief (GTK_BUTTON (add), GTK_RELIEF_NONE); */
    g_signal_connect (add, "clicked", more_parts, data);
    gtk_box_pack_start (GTK_BOX (hbox), add, FALSE, FALSE, 3);
    
    gtk_box_pack_start (GTK_BOX (inframe), hbox, FALSE, FALSE, 3);
    
    l = ff->actions;
    while (l) {
        part = l->data;
        d(printf ("adding action %s\n", part->title));
        w = get_rule_part_widget ((FilterContext *) rc, part, fr);
        attach_rule (w, data, part, i++);
        l = l->next;
    }
    
    hadj = gtk_adjustment_new (0.0, 0.0, 1.0, 1.0 ,1.0, 1.0);
    vadj = gtk_adjustment_new (0.0, 0.0, 1.0, 1.0 ,1.0, 1.0);
    scrolledwindow = gtk_scrolled_window_new (GTK_ADJUSTMENT (hadj), GTK_ADJUSTMENT (vadj));
    gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwindow),
                                        GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
    
    gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (scrolledwindow), parts);
    
    gtk_box_pack_start (GTK_BOX (inframe), scrolledwindow, TRUE, TRUE, 3);
    
    /*gtk_box_pack_start (GTK_BOX (inframe), parts, FALSE, FALSE, 3);*/
    
    gtk_widget_show_all (frame);
    
    gtk_box_pack_start (GTK_BOX (widget), frame, TRUE, TRUE, 3);
    
    return widget;
}